Siemens SINAMICS V20 VFD
Siemens SINAMICS V20 VFD code F20: DC ripple too high
The calculated direct current ripple level has exceeded the safe threshold, causing the drive to stop the booth.
Safety first. This code involves a gas, flame or electrical hazard. Do not keep resetting it. Leave burner, gas train and high voltage work to a qualified technician. WERCS answers 24/7 at (877) 489-3727.
- Code
- F20
- Name
- DC ripple too high
- Controller
- Siemens SINAMICS V20 VFD
- Type
- Power supply
- What it does
- Fault: the equipment trips and stops
- Risk
- RED Specialist territory
- Reset
- Needs a manual reset
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated November 4, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- What the manual says to do, and the page it is on
- The 1 common cause listed for this code
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does Siemens SINAMICS V20 VFD code F20 mean?
The calculated direct current ripple level has exceeded the safe threshold, causing the drive to stop the booth.
Is Siemens SINAMICS V20 VFD code F20 dangerous?
It is graded red, specialist territory: it involves a burner, gas, flame or safety lockout, so leave the repair to a qualified technician.
How do I fix Siemens SINAMICS V20 VFD code F20?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.
Other Siemens SINAMICS V20 VFD codes
F5 · Converter I2tF6 · Chip temperature rise exceeds critical lF11 · Motor overtemperatureF12 · Converter temperature signal lostF23 · Output current ripple too highF35 · Maximum number of auto restart attempts F41 · Motor data identification failureF51 · Parameter EEPROM faultF52 · Converter software faultF60 · Asic timeout